Try looking for NK-02, he was a droid based off Grievous, and even thought he was the General reborn. The NK-02s were going to be mass produced by the Empire, but the project was canceled and Necrosis was dismantled. I made up his ship the "Fist of Grievous". DT3-005 and TR-C21 are both made-up.

NK-Necrosis was a Grievous-based droid wielding a dual-bladed red lightsaber, who was trained by IG-100 Magnaguards. He had trouble accepting the fact that he was not, in fact, a former Kaleesh warlord trapped in a droid's body, but simply a replica. Found in Star Wars Galaxies: Trials of Obi-Wan.